Introduction to the Cao Family Old House: The Cao Family Old House has three main rooms, six side rooms, and a total of 12 rooms including kitchen, toilet and other buildings. Except for one room that collapsed, the rest remained basically intact. The old house was assigned to the Yan family during the land reform, so later generations called it the "Yan family old house". After the old man surnamed Yan passed away, many of his descendants were away, so the house was empty and slightly deserted.